Papers by Keyword: Piled Raft Foundation

Abstract: For high-rise buildings piled raft foundation reinforcement, use ANSYS to establish the piled raft foundation complement pile reinforcement model which is called long-short-piled raft foundation. Parameters of complement pile respectively from the aspects of pile length and pile diameter for change, study its effect on piled raft foundation vertical bearing performance. Provide certain reference value for practical engineering.

Abstract: In this paper, the FEM software ABAQUS is used to analysis the pile-soil load share ratios, load share value of pile side friction and tip resistance for three bases, including natural raft foundation, conventional piled raft foundation and two-phase varying stiffness piled raft foundation. Furthermore, the deformation and settlement of deformation-coordinating device are studied as well. Based on the research of the working characteristic of piles and soil, it highlights the good working mechanism of two-phase varying stiffness piled raft foundation. The analysis results show that two-phase varying stiffness piled raft foundation, with obvious two phase stress characteristics, has a working principle between natural raft foundation and conventional piled raft foundation, fully making use of the bearing capacity of foundation soil, effectively improving the joint bearing capacity of piles and soil.

Abstract: In order to analyze the behavior of piled raft foundations under vertical loadings, a simplified method called settlement compensation method (SCM) is proposed based on the basic principles in the code for design of building foundation of China. The effect of several influence factors of the SCM was investigated through an exemplar case. The applicability and accuracy of SCM was checked theoretically with a finite element analysis, and verified practically through a case study in which the results of settlement analysis of other methods were included for comparison.

Abstract: When the loading sustained by the foundation is large, employing piled raft foundation is one of the best solutions. In the elasto-plastic design of piled raft, piles could improve the differential settlement and reduce raft thickness. As the raft sustains high earth and water pressures, by reducing the span length of raft and excavation depth, one can get economic design. Using elasto-plastic property of the pile is a better method to avoid increasing the pile length and pile diameter and making full capacity of the piled raft foundation in design compared to normal piled raft. With adoption of few small diameter piles, the raft thickness could be reduced significantly. This makes it much better than raft foundation.